[Perfect DIY Product (Ver 3.4)]: Vector Network Analyzer provides perfect vector network measurement capability, small and handheld, with 2.8 inch LCD display, portable battery powered or USB powered (battery not included)  [Metal shielding design]: HF VHF UHF UV VNA antenna analyzer adopts metal shielding design, which can reduce external interference and improve measurement accuracy.  [Improved Frequency Algorithm]: The antenna analyzer can use the odd harmonic extension of si5351 to support measurement frequencies up to 900MHz. The TX/RX method measures the complete S11 and S21 parameters. If you need to buy S12 and S22, you will need to manually replace the transceiver port wiring.  [Small and portable, easy to use]: The unit is designed to be equipment (OE) fit, form and function, simple and practical PC control software, we can output Touchstone (snp) for various radio design and simulation software through PC software )document.  [10KHz-1.5GHz frequency algorithm]: The si5351 direct output in the frequency range of 50k-300MHz provides better than 70dB dynamics, the extended 300M-600MHz frequency band provides better than 60dB dynamics, and the 600M-900M frequency band is better than 50dB dynamics.    Colour:black  Material:Metal    Package Contents:  1 set * spectrum analyzer    Only the above package content, other products are not included.  Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.